(19)

(11)

EP 1 964 223 A1

(12)

(43) Date of publication: 03.09.2008 Bulletin 2008/36 (21) Application number: 06820406.4 (22) Date of filing: 05.12.2006

(51) International Patent Classification (IPC):  H02G 1/12(2006.01) (86) International application number: PCT/GB2006/004521 (87) International publication number: WO 2007/071911 (28.06.2007 Gazette 2007/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 22.12.2005 GB 0526149 (71) Applicant: Heat Trace Limited Frodsham, Cheshire WA6 0DJ (GB)	(72) Inventor: LEE, Bo-Hwan Cheshire WA6 0DJ (GB) (74) Representative: Davies, Robert Ean  Appleyard Lees 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)